题文
We were swimming in the lake __________ suddenly the storm started.
| A．when | B．while |
| C．until | D．before |
推荐试卷
We were swimming in the lake __________ suddenly the storm started.
| A．when | B．while |
| C．until | D．before |
试题篮
()
粤公网安备 44130202000953号
